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Endcap Design. Dave Bailey University of Manchester. TESLA TDR Layout. ECAL endcap 4 quadrants 2 quadrants bolted together to make one structural unit Bolted to the HCAL front face “Embedded” in the HCAL endcap Each quadrant is about 5 tonnes. Monolithic Endcap. Single quadrants
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Endcap Design Dave BaileyUniversity of Manchester
TESLA TDR Layout • ECAL endcap • 4 quadrants • 2 quadrants bolted together to make one structural unit • Bolted to the HCAL front face • “Embedded” in the HCAL endcap • Each quadrant is about 5 tonnes
Monolithic Endcap • Single quadrants • Could use the same ideas as the barrel to hold the slabs • Long slabs close to the beampipe • Does this impact on the DAQ due to more beam-related backgrounds?
Modular Endcap • Should the endcap be made up from smaller units? • Keeps the slab size small • Fewer problems with signals routed over long PCBs? • Mechanically more robust? • But • Some “odd shapes” • More cracks • Physics Impact?
So what should we do? • Look at both types of structure • What sort of modules to use • Start with current barrel ideas • Think about assembly of individual quadrants • Need to assess impact on physics • Get any new designs into simulation • Set up local replica of Mokka database in Manchester to use with Tier 2 centre